The Kwikee Series 31 electric RV step uses Lippert's B-linkage gearbox. The factory drawing identifies the gearbox separately from its drive motor and linkage pins, making it easier to replace a damaged component without ordering a part meant for a different Kwikee series.
Use the step's identification label and the original motor/controller numbers before ordering. Earlier Kwikee motors and controllers cannot always be mixed with later IMGL-II components.
Series 31 B-linkage exploded motor and gearbox diagram
Lippert groups Series 31 with Series 28 and 39 for the B-linkage replacement components. In the illustrated parts view, callout 1 identifies the motor, callout 2 the connecting pins and callout 4 the B-linkage gearbox. The A- and C-linkage assemblies shown nearby serve different step mechanisms.
Kwikee Series 31 numbered parts · Lippert B-linkage system
Callout 1: 676061 motor and screwsFor the later IMGL-II drive; check the installed motor and controller
Callout 4: straight B-linkage gearboxView part 379161
Callout 2: cotter and clevis pin kitView part 379178
Callout 1: motor and screws, Lippert 676061 for the 2019-onward IMGL-II system. These are photos of the matching service parts; the complete manufacturer exploded drawing is in the full-size PDF link below.
Kwikee Series 31 parts by manufacturer number
| Drawing / use | Part # | Component | NewRVParts link or identification |
|---|---|---|---|
| 1 | 676061 | IMGL-II motor and screws | Use only with the applicable later motor/control system |
| 2 | 379178 | Cotter and clevis pin kit | Shop pin kit 379178 |
| 4 | 379161 | B-linkage gearbox | Shop gearbox 379161 |
| Older kit | 379769 | Earlier B-linkage motor, gearbox and control upgrade package | View kit 379769 |
| Earlier control | 379146 | 9510 IMGL step controller | View controller 379146 |
| Later drive | 713488 | IMGL-II complete B-linkage motor/gearbox | Match installed drive generation |
| Later control | 786949 | IMGL-II controller | Do not combine with the older IMGL motor |
| Update | 781006 | B-linkage motor and controller update kit | Compare the original drive and controller first |
Motor-generation check: A pre-2006 step may require a conversion kit, while Lippert instructs that a failed 2006–2018 IMGL motor or controller be updated as a pair. For IMGL-II steps, use components listed for the newer drive system.
B-linkage parts and kit photographs
Compare these four product photos with the gearbox, pins, kit and control labels on your Series 31 step. An old kit number is not a substitute for checking the installed electrical generation.
Factory B-linkage motor and controller update chart
This chart identifies the parts used before 2006, during the 2006–2018 IMGL period and in the later IMGL-II system. The same series number does not mean the motor and controller from different generations can be interchanged.
Kwikee Series 31 motor and control generations
Check the installed motor and controller version before ordering. Open the factory chart below for the complete replacement guidance.
Related model-specific guides
Manufacturer drawing and motor chart: Lippert Kwikee electric-step owner's manual.